INCOME TAX - Additional Information (Detail) - USD ($)	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020
Income Tax Disclosure [Abstract]
Income tax expense	$ 0	$ 0	$ 0	$ 0
Unrecognized tax benefits	$ 3,000,000.0		3,000,000.0		$ 2,700,000
Accrued interest and penalties related to uncertain tax positions			$ 0		$ 0